Professor of Radiology, University of Paris Diderot Sorbonne Cité Chair, Department of Radiology The University Beaujon Hospital Clichy, France
Liver metastases are by far the most common liver malignancies. The most frequent liver metastases originate from colorectal cancer, pancreatic cancer, lung cancer, and breast cancer ; yet many other primary cancer can speard metastases to the liver. The diagnosis can be easy when the primary cancer is diagnosed, but may be more challenging when liver tumors are likely to be liver metastases. Indeed, most liver metastases look like the primary cancer. This lecture will focus on the imaging presentation of liver metastases. The most common liver metastases are fibrous metastases secondary to colorectal, pancreatic, and breast cancer. Hypervascular liver metases are commonly secondary to neuroendocrine cancer, but may be seen in less common cancers. Peculiar imaging features will be discussed: cystic liver metastases, calcifications, lymphangitic metastases, endobiliary metastases. The differentials will be considered for each imaging presentation.